Development of intelligent sensor containing H2S indicators

Author(s)

Edison Tutomu Kato Junior

• Document type: Doctoral Thesis
• Press: Campinas, SP.
• Institution: Universidade Estadual de Campinas (UNICAMP). Faculdade de Engenharia Química
• Defense date: 2013-12-07

Examining board members

Telma Teixeira Franco; Rosemary Aparecida de Carvalho; Pilar Rodriguez de Massaguer; Jamal da Silva Chaar; Fernando Rodrigo Frederico

• Advisor: Cristiana Maria Pedroso Yoshida; Telma Teixeira Franco

Abstract

A smart sensor was developed in this study to detect the presence of hydrogen sulphide gas (H2S). This sensor can be applied for leakage control in the petrochemical industry and also in quality control of food products, once the H2S is one of the metabolites released by contaminating microorganisms under anaerobic conditions. This system has the function of communicating the presence of H2S in the case of leaks in the recovery line at critical points (seals, valves, connections, etc.) in petrochemicals. It can inform the consumer possible microbiological changes in the product during transport and storage, indicating the state of freshness of the product. The biodegradable and smart sensor was developed using chitosan, a natural polymer derived from the disposal of the fishing industry, biodegradable and capable of forming resistant, flexible films and efficient barrier to oxygen. The accumulation of trash of hard degradation is increasing worldwide. The incorporation of H2S indicators produces a colorimetric signal as a rapid response to the presence of this compound. The aim of this study was to obtain intelligent sensors with H2S indicators, the characterization of the sensor as its mechanical properties, correlation of the calculated thickness / practice and ability to absorb water, efficienty evaluation in a real environment on the analysis of the identification of microbiological contamination and analysis to characterize the interaction between the chitosan matrix and the colorimetric indicator (AU)

• FAPESP's process: 08/09464-1 - Biodegradable and Inteligent sensor: H2S indicator
• Grantee: Edison Tutomu Kato Junior
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)